 public class Bookshelf
 {
    public static void main(String[] args)
    {
       Book book1 = new Book("NaHan", "LuXun", "People's Literature Publishing House", "2018.3.28");
       Book book2 = new Book("Gulliver's Travels", "Jonathan Swift", "People's Literature Publishing House", "2018.3.28");
       Book book3 = new Book("Foudations of Program Design", "John Lewis", "Publishing Home of Electronics Industry", "2018.3.28");
      
       System.out.println();
       System.out.println(book1);
       System.out.println(book2);
       System.out.println(book3);
   }

 } 

 
